Concrete-form clamp



- c. ALLMAN CONCRETE FORM CLAMP v Filed Sept. 22. 19.26

2 She ets-Sheet 1 g-oento c LI kill/r12 1.

Feb. 28, 1928.

3 1,660,905 I J. c. ALLMAN CONCRETE FORM CLAMP.

Filed Sept. 2 2. 1926 2 Sheets-Sheet 2 Patented Feb. 28, 1928 UNITEDSTATES JOHN C. ALLMAN, or PITTSBURGH, PENNSYLVANIA.

CONCRETE-FORM CLAMP.

Application filed September 22, 1926. Serial No. 137,110.

The invention relates to means for'holding assembledconcrete forms andhas for its object the provision of a clamping means that is quickly andeasily assembled and will eifectively hold the partsof the form together and may be quickly dismembered when it is desired to remove theform from the completed molded object.

A further object of the invention is the provision of a clamp comprisingseparable members adapted to be adj ustably seci'zred togetherto form apolygon enclosing the form members,'with means to strain the clamp intointimate relation witn the form members and meansto hold theclamp instrained position. v

A further object of the invention is the provision of a clamp made up oftwo memhers having bifurcated ends, and other members adapted to fitbetween the lingers of the. bifurcated ends and having oblique notchesin one of their edges to engage pins straddling the bifurcated ends ofone of the bifurcated members and one end of the other bifurcatedmember. The remaining end of the last mentioned bifurcated member andthe end of the other member in lapped relation therewith are notched toreceive a latch member to hold the device in clamping position.

The invention will be described in detail hereinafter and will be foundillustrated in the accompanying drawings in which Figure 1 is a planview of a concrete form made in accordance with the invention,

Figure 2 is an edge view,

Figures 3 and 4, sectional views on the planes indicated by the lines 33and 44 of Figure 1,.

Figure 5, a plan view of a latch member, and f Figures 6 and 7 plan andedge views, respectively, of the straining tool.

In the drawings similar reference characters will be used to designatecorresponding parts throughout the several views.

The device as disclosed in the drawings is designed to be used forholding the form members for casting a column or pillar, but obviouslythe device to be hereinafter described may be differently proportioned,without departing from the-spirit of the invention to hold form membersfor different kinds of concrete casting, so that the invention is notlimited to the specific arrangement as shownexcept where limited in, theappended claim.

The form clamp comprises members 1, 2, 3, and t that may be made of anysuitable material, and as hereinbefore stated of any relativeproportions. The members- 1 and 2 have their ends bifurcated as shown at1, 1", 2 and 2, respectively. The bifurcated ends 1, 1 and 2 have aseries of pins 5 secured therethimigh and straddling the space betweenthe fingers of the bifurcation, while th bifurcated end 2 is providedwith a series of notches 6 arranged at substantially an angle of 45degrees to the edge of the part 2. l i

The member 3 is provided with notches 3 at one of its ends, and notches3", at its other end, said notches being on angles of substantially45degrees, andthe part 3 is adapted to lit between the fingers of thebifurcated ends 1 and 2 and the notches 3 and 3* will engage pins 5therethrough, it being understood that in adjusting the clamp on themold one of the pins on each member 1 and 2 is selected to engage one ofthe notches in the respective end of the member 3 to snugly engage themembers 1, 2, and 3 on the mold. The member 4 is provided with notches4: in one of its ends corresponding to the notches 3 and 3",hereinbefore described, and member 4 is adapted to fit be tween thefingers of the bifurcated ends 1 and 2 of the members 1 and 2 and beadjusted to snugly engage the mold by arranging one of the pins 5 in oneof the notches 4. The other end of part dis provided with notches 42similar to the notches 6 in the part 2, and the purpose of the notches 6and v 49* will be now described.

After the members 1, 2, 3, and 4 have been assembled around the mold ashereinbefore described, the members are strained into clamping relationby means of a tool illustrated in'Figures 6 and 7, this tool comprisinga handle 7 having a bifurcated end 8 between the legs of which ispivoted an arm 9 by means of a pin 10, and has a transverse pin 11adjacent to its free end, and the ends of the pin extend above and belowthe upper and lower surface of the arm to form lugs adapted to engagealine'd notches 6 in the end. 2 of the part 2, and a pin 12 straddlingthe legs of the bifurcated end adjacent to their outer ends that isadapted to engage one of the notches 4 in the end of the part 41-.

The tool described is in the nature of a toggle lever, and it will beapparent that When it is in the position as indicated in Figure 1, thelevermaybe operated to strain the ends of the members 2 and l to clampthe members around the form. To hold the clamp in a strained position,alatch member such as illustrated in Figure 5 is inserted as indicated,in Figure 1 to engage :in-oppositely disposed notches a and 6 to holdthe clamp in strained position. The latch 'comprises a plate 13 oftapered formation, the narrow end 14 being adapted to engage in notches1 while thewider end 15 straddles the bifurcated end 2 and engages thenotches therein. The opening 16 inthe plate 13 may be use'd'forinsertion of a tool for removing the latch when the clamp is to bedismem- 'bered, and may also be used for suspending the latch memberfrom a pin or other holder when not in use.

It will be apparentthat to dismember the clamp'the toggle leverillustrated in Figures 6 and 7 may again be used to strain the lappedends of the members 2 and 41 sothat bars and one end of the other ofsaid bifurcated bars to engagenotches in the second mentioned bars, thenotches engaged by said pins inclining outwardly towards the adjacentends of the bars to draw theengaged bars inwardly of the clamp, theremaining end of one of the bifurcated bars being notched, the notchesin the bifurcated bar and the adjacent end portion of the bar engagedthereby being inclined inwardly of the respective bars. and a latch toengage the oppositely disposed last mentioned notches.

In testimony whereof I aflix my'signature.

JOHN C. ALLMAN.

